Understanding the Three Stages of Labour

Labour is a transformative physiological process that brings new life into the world. For nursing students and healthcare professionals, understanding the three distinct stages of labour is essential for providing safe, effective maternal care. Each stage involves specific changes in the mother’s body and requires targeted nursing interventions to ensure both maternal and fetal well-being.

What defines the stages of labour? 🔗

Labour begins with regular uterine contractions that cause progressive cervical dilation and effacement, ultimately leading to the birth of the baby and delivery of the placenta. The process is divided into three stages, each with distinct characteristics and nursing care requirements.

First stage: Cervical dilation and effacement 🔗

The first stage of labour is the longest and most variable stage. It begins with the onset of regular, progressive contractions and ends when the cervix reaches full dilation at 10 centimeters. This stage is further divided into three phases: latent, active, and transition.

Latent phase: Early cervical changes 🔗

During the latent phase, the cervix opens from 0 to approximately 6 centimeters. This phase is characterized by mild, irregular contractions that gradually become more regular. The cervix softens, thins (effaces), and begins to dilate slowly. Current guidelines recommend defining a prolonged latent phase as lasting more than 16 hours, regardless of whether the woman has given birth before.

Nursing interventions during the latent phase: Encourage rest and hydration. Monitor vital signs and fetal heart rate. Teach breathing and relaxation techniques. Many women remain at home during early latent labour, coming to the hospital when contractions become stronger and more frequent.

Active phase: Rapid progression 🔗

The active phase typically begins around 6 centimeters of dilation and continues until the cervix reaches 10 centimeters. During this phase, cervical dilation occurs at approximately 1 to 2 centimeters per hour, with multiparous women (those who have given birth before) typically dilating faster than nulliparous women (first-time mothers).

Contractions become significantly stronger, longer, and more frequent during active labour. Women often require pain management strategies during this phase, whether pharmacological or non-pharmacological.

Nursing interventions during active labour: Continuous monitoring of maternal vital signs and fetal heart rate is essential. Intermittent auscultation of the fetal heart rate is recommended at least every 30 minutes during active labour in low-risk pregnancies. Encourage position changes and ambulation if appropriate. Provide pain relief options including epidural analgesia, intravenous opioids, or non-pharmacological methods. Support the labouring woman emotionally and provide clear communication about labour progress.

Transition phase: Final preparation 🔗

The transition phase occurs at the end of the first stage, typically from 8 to 10 centimeters of dilation. This is often the most intense and challenging part of labour. Contractions are very strong, lasting 60 to 90 seconds and occurring every 2 to 3 minutes. Women may experience strong pressure in the lower back and rectum, nausea, shaking, or a feeling of being overwhelmed.

Nursing care during transition: Provide continuous support and encouragement. Help the woman manage the urge to push until full dilation is confirmed, as pushing before complete dilation can cause cervical edema and delay delivery. Guide her through breathing techniques during contractions.

Second stage: Birth of the baby 🔗

The second stage begins when the cervix reaches complete dilation at 10 centimeters and ends with the birth of the baby. This stage can last from a few minutes to a few hours, depending on factors such as parity, use of epidural anesthesia, and fetal position.

During this stage, the baby descends through the birth canal while rotating to navigate the maternal pelvis. The baby undergoes the cardinal movements of labour: engagement, flexion, descent, internal rotation, extension, external rotation, and expulsion.

Pushing and delivery 🔗

Current guidelines recommend defining a prolonged second stage as beyond 3 hours of pushing in first-time mothers and beyond 2 hours in women who have given birth before. However, the decision to intervene should be individualized based on maternal and fetal status.

Nursing interventions during the second stage: Coach the woman on effective pushing techniques. Monitor fetal heart rate closely, checking at least every 15 minutes in low-risk pregnancies. Encourage upright or lateral positions which can reduce the duration of labour and decrease abnormal fetal heart rate patterns. Prepare the delivery area with necessary equipment. Support the perineum during delivery to reduce the risk of severe lacerations. After the baby is born, ensure the airway is clear and place the newborn skin-to-skin with the mother for bonding and temperature regulation.

Third stage: Delivery of the placenta 🔗

The third stage of labour begins immediately after the birth of the baby and ends with the delivery of the placenta. This stage typically lasts between 5 and 30 minutes, though delivery beyond 30 minutes increases the risk of postpartum hemorrhage.

Signs of placental separation 🔗

Three cardinal signs indicate that the placenta has separated from the uterine wall: a gush of blood from the vagina, lengthening of the umbilical cord, and the uterus becoming globular and firm on palpation. Once these signs appear, gentle cord traction with uterine counter-pressure helps deliver the placenta.

Active versus physiological management 🔗

There are two approaches to managing the third stage. Active management involves administering a uterotonic medication (typically oxytocin) immediately after the baby’s birth to stimulate uterine contractions and reduce bleeding risk. Physiological management allows the placenta to be delivered naturally without medication, which may take up to an hour.

Active management is associated with reduced risk of significant blood loss and postpartum hemorrhage, which is why it’s recommended as standard practice in most hospital settings.

Nursing care during the third stage 🔗

Key nursing interventions include: Monitor vital signs every 15 minutes initially, then every 30 minutes. Administer prophylactic oxytocin as ordered, typically 5 to 10 units intravenously or intramuscularly, to prevent postpartum hemorrhage. Assess vaginal bleeding for amount, color, and presence of clots. Palpate the uterus to ensure it is firm and contracted. Promote skin-to-skin contact between mother and newborn, which stimulates natural oxytocin release. Assist with placental inspection to ensure it has been delivered completely, as retained placental fragments can cause bleeding and infection. Support early breastfeeding attempts, which also stimulates maternal oxytocin production.

The importance of individualized care 🔗

While these stages provide a framework for understanding labour progression, every woman’s experience is unique. Factors such as parity, maternal age, fetal size and position, use of pain medications, and maternal health conditions all influence how labour unfolds. Effective interprofessional teamwork among nurses, midwives, physicians, and other healthcare providers significantly improves outcomes by reducing cesarean delivery rates and hospital stays.

Nursing care during labour requires clinical expertise, compassionate support, and continuous assessment. By understanding the physiological changes and potential complications at each stage, nurses can provide evidence-based interventions that promote safe delivery and positive birth experiences for mothers and their babies.

What do you think? How might understanding the distinct phases within each stage of labour help you provide more personalized support to labouring women? What challenges might you anticipate when caring for a first-time mother versus a multiparous woman during the transition phase?

References

1. https://www.ncbi.nlm.nih.gov/books/NBK544290/
2. https://www.mayoclinic.org/healthy-lifestyle/labor-and-delivery/in-depth/stages-of-labor/art-20046545
3. https://www.ncbi.nlm.nih.gov/books/NBK615337/
4. https://medicalguidelines.msf.org/en/viewport/ONC/english/8-1-normal-third-stage-of-labour-51417770.html
5. https://www.tommys.org/pregnancy-information/giving-birth/labour-and-birth-faqs/do-i-need-injection-deliver-placenta
6. https://med.libretexts.org/Bookshelves/Nursing/Maternal-Newborn_Nursing_(OpenStax)/18:_Nursing_Care_and_Interventions_During_Labor_and_Birth/18.04:_Nursing_Care_During_the_Third_Stage_of_Labor